In pkgconf through 1.9.3, variable duplication can cause unbounded string expansion due…
Priority LOW 26CWE-787Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.
Summary
In pkgconf through 1.9.3, variable duplication can cause unbounded string expansion due to incorrect checks in libpkgconf/tuple.c:pkgconf_tuple_parse. For example, a .pc file containing a few hundred bytes can expand to one billion bytes.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00581 48th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift AI (RHOAI) | Affected | — |
Timeline
- 2026-10-02 Threatist record created from CVE-2023-24056
- 2026-10-03 Alias added: GHSA-6rfm-3v66-6wr2
- 2026-11-06 Affected versions changed · Red Hat
References
More Pkgconf vulnerabilities
- TI-2018-15866 pkgconf version 1.5.0 to 1.5.2 contains a Buffer Overflow vulnerability in dequote() that… CVSS 3.0CRITICAL 9.8
Sources
- CVE-2023-24056 · CVE Program
- CVE-2023-24056 · NVD
- FIRST EPSS
- GHSA-6rfm-3v66-6wr2 · GitHub Advisory Database · CC BY 4.0
- CVE-2023-24056 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences